PSP downgrade Help

Hi there. I'm psp newbie and I have some questions about downgrading my psp.

1. I have a European PSP (comes with 2.5), can I still downgrade?
2. The downgrade announced today in pspbrew home can be trust?
3. The TA-082 psp version are the white ones, right?
4. If I decide after to upgrade my psp to a later version can it be done?

Best Regards

1.idk
2.yea
3.no, there's a place on ur psp u have to look to find out if it's a t-082, inside the umd drive on the right side of the green board, if no writing ur safe. (under the word umd)
4.yes, ppl have downgraded to 1.5 then upgraded to 2.0 and downgraded agen to 1.5

[Terdinglage]

I would reccomend you take the updated link to an easy downgrader on the main page of the site. Get the full version of it, and go through every step carefully. If you PSP is labeld TA-082 or if it came with any version later than 2.01 out of the box, you cannot continue with the downgrade process. Otherwise, if you follow the directions it should be totally safe.

oh, btw terd, the downgrader on the first page worked like a charm, after it got done flashing it automatically rebooted and 1.5 was on! Of course the ver. number read 7.something tho but it was changed to 1.5 with xflash. So, just as a testimonial, heres exactly what i did and it worked.
1.dl the downgrader that corresponds to ur firmware 2.5 or 2.6 ( idk what the diff is but it couldnt hurt to dl the one meant for urs)
2.IF u know uv upgraded ur psp to 2.5 or 2.6 then ur good, but i got a used psp from game stop and didnt if it was 2.5 from factory so i upgraded to 2.6 just to make sure bricking was out of chance's hands
3. Install the .exe on a mem stick bigger than 32 and after it installs make sure u have all the needed files, the one on the main page installed everthing just right.
4. i pluged in the psp, ran gta and everything worked according to plan.

Of course b4 i did all this i made sure there was no writing on the board on the back of the psp.

Thanks for the help